If it possible to have feelings for two people at once?

I've been double dating for about 3 months now. Even though neither of them are my boyfriend, it seems to be getting serious and both already hinted about getting exclusive.

I end up saying that I'll think about it but that's about it. Neither of them know each other. The truth is I'm having feelings for both of them. One is an outgoing French guy that likes hiking and the other is in my college (also studying my major, which is physiology).

I'm having a hard time deciding which one I would want to be exclusive with. Both seem relationship material.